Fits all 5.9 inch to 6 inch hoses. Compatible with the back of many portable air conditioner units. Designed to fit down to 5.9 inch diameter exhaust hose. Works with both clockwise and counterclockwise hoses. Easy to use: No tools required. No drilling needed. Connects directly to the exhaust hose and can be easily installed on the back of the portable air conditioner. Enhances cooling efficiency: Attaches the exhaust hose securely to the air conditioning unit, helping the unit operate more efficiently and cool the room faster. High quality: Made from durable plastic material. Long-lasting and cost-effective. Model: Round Diameter: 15 cm Material: Plastic Color: Gray White Package Contents: 1 x Interface Note: Light and display differences may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.